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NorthStar 958, Operator'S Manual

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NorthStar 958 Operator'S Manual Download Page 139

Chapter 10 - Understanding Radar Functions

958 Operator’s Manual, Rev. A

Page 131

If there’s no radar overlay on the chart, you scale the chart and 
radar separately; zooming in on the chart, for example, has no 
affect on the radar. If the 

CONTROL

 key indicates 

RADAR

, 

you’re zooming the radar; if it indicates 

CHART

, you’re 

zooming the chart.

However, if the chart has a radar overlay and you zoom in on 
the chart, radar changes to match. Changing the chart’s scale 
changes the radar; and changing the radar’s scale changes the 
chart, even if the chart isn’t visible.

Changing the

rotation

To change the radar’s rotation, press the 

ROTATE

 key 

repeatedly until it indicates the rotation you want; you have 
the same options as for a 

CHART

 screen (see ”Rotating the 

chart” starting on page 49).

The rotation of the chart and the rotation of the radar interact 
under certain circumstances, as described in the table below. 
Assume that the chart and radar are both north-up at the start. 
If the 

CONTROL

 key indicates 

RADAR

, you’re rotating the 

radar; if it indicates 

CHART

, you’re rotating the chart.

If the 

CHART

 

screen’s in ...

And the radar image is ...

Overlaid on the chart

Not overlaid

Browse mode

The chart can’t rotate; but if 
you change the 

CONTROL

 

key to 

RADAR

, the chart’s 

mode automatically switches 
to vessel (see below)

The chart can’t rotate but the 
radar can rotate; so if you 
change the radar to leg-up, 
the chart doesn’t change (it 
stays north-up)

Vessel mode

Chart and radar both rotate 
together, so if you change 
the radar to leg-up, the chart 
automatically changes to 
match (and vice versa)

Chart and radar both rotate 
but separately; so if you 
change the radar to leg-up, 
the chart doesn’t change 
(and vice versa)

Summary of Contents for 958

Page 1: ...NORTHSTAR 958 Integrated Navigation System Operator s Manual P N GM958UM Revision A ...

Page 2: ......

Page 3: ...of the owner To be covered by this warranty the Northstar equipment must have been in normal use This warranty does not apply to 958 s with defects caused by improper installation phys ical damage abuse tampering lightning or other abnormal electrical discharge or to 958 s with defaced or altered serial numbers or to 958 s repaired by unauthorized persons or repaired in a manner that violates Nort...

Page 4: ...he sole source of navigation guidance Exercise caution and good judgment when underway CAUTION The electronic chart is an aid to navigation designed to facili tate the use of authorized government charts not replace them Only official government charts and notices to mariners contain all the information needed for safe navigation and as always the user is responsible for their prudent use ...

Page 5: ...21 Introducing radar 25 Introducing the echo sounder 25 Introducing alarms TideTrack and video 25 Maintaining the 958 26 Interfacing the 958 28 3 Using the Controls 29 Using the PWR key 30 Using the five function keys 30 Using the CURSOR PAD 32 Using the SAVE key 33 Using the MOB key 33 Using the alphanumeric KEYPAD 34 Using the menu keys 35 Using the BRIGHTNESS key 36 Using the IN and OUT keys 36...

Page 6: ...aypoints 75 Creating avoidance area waypoints 80 Editing waypoints 83 Updating waypoint coordinates 84 Moving waypoints routes between units 85 Transferring waypoints to and from a PC 91 7 Understanding the Routes Function 93 Introducing routes 94 Creating routes from the chart 95 Creating routes from a waypoints list 97 Saving a route as you travel 97 Editing a route 100 8 Understanding Waypoint ...

Page 7: ...ing alarms 144 Understanding TideTrack 158 Using the video display option 160 12 Setting Up Your 958 163 Changing your display settings 164 Changing your navigation settings 167 Changing your receiver settings 172 Changing your port settings 177 Setting up the sounder 177 Setting up radar 177 Installing Software Updates 178 Displaying manufacturer s information 178 Changing the time zone 182 Appen...

Page 8: ...Page iv 958 Operator s Manual Rev A ...

Page 9: ...d off 5 Displaying the chart screen 7 Using chart data 9 Displaying detailed position information 13 Using demo mode 14 Going to a quick waypoint now 16 This chapter introduces this manual familiarizes you with the 958 s navigation functions and CHART screen features and explains how to display basic positioning information on the CHART screen ...

Page 10: ...troubleshooting the 958 please see the Northstar 958 Installation Manual part number GM958IM or contact your local authorized Northstar dealer Using this manual This manual complements the 958 s ease of use by describing and illustrating its various functions in a format that s conducive to fast learning and safe operation The manual s sections are grouped by related functions starting with an ove...

Page 11: ...he six menu keys located in a vertical row on the right side of the 958 DISPLAY TEXT is the type style used for text that appears on the display screens Sample 958 screen is the type style used for captions of display screens Figure 1 is the type style used for captions of figures A bulleted list contains a series of related items or topics A numbered list contains a series of steps in a procedure...

Page 12: ...tware revision available whenever contacting or corresponding with your dealer or Northstar If you need help call the Northstar Service Department at 978 897 6600 NOTE To prevent delays it s critical that you first obtain a Return Materials Authorization RMA number from the Service Department before return ing your 958 to Northstar The 958 is covered by a two year limited warranty see the Limited ...

Page 13: ... to the following address Northstar Technologies 30 Sudbury Road Acton MA 01720 If you have special overnight or second day shipping requirements UPS or Federal Express please call Northstar for turnaround time and freight costs before you ship your 958 For details about service procedures see the Limited Warranty Policy in this manual Turning the 958 on and off Turning the 958 on To turn the 958 ...

Page 14: ...R NAV LOG or WAYPTS ROUTES located below the display screen A 958 that has recently been used at or near that same loca tion will usually be ready to navigate within one minute Now you re ready to get underway with your 958 CAUTION Be extremely careful when navigating with electronic charts Although every effort has been made to ensure that the data the 958 uses is as close as possible to paper ch...

Page 15: ...ginning on page 128 Turning the 958 off To turn the 958 off press and hold the PWR key for a few seconds until the screen goes dark Displaying the chart screen Displaying your vessel s present position After the 958 successfully completes its start up sequence press the CHART function key to display the CHART screen You ll see your present position represented by a black triangular vessel symbol i...

Page 16: ...the chart To change the chart viewing angle from north up to course up to heading up to leg up cycle through the choices by pressing the ROTATE key The current angle is shown at the bottom half of the key Displaying other information You can set up your 958 s CHART screen to display your current route your track history nearby waypoints or avoidance points a lat lon grid a radar overlay or other c...

Page 17: ...minutes to acquire the necessary information and after that is ready to navigate The word NEW in the upper right corner tells you this message hasn t already been acknowledged To acknowledge press the CLEAR ALARM menu key As soon as the 958 acquires its signals you ll be ready to go For details about alarms see Using the alarms starting on page 25 and see Understanding alarms starting on page 144 ...

Page 18: ...overing a specific geographic location typically providing zoom in and out levels ranging from a maximum detail of 1 4 nm across the screen to an overview of up to 256 nm across Virtually every major port and most popular boating areas are available on these cartridges and new charts are constantly being added For details about obtaining Navionics charts contact your authorized Northstar dealer In...

Page 19: ...cially older ones in this case only the word PRESENT is shown rather than the name and date Before you insert the cartridge make sure the cartridge label is facing up and the cartridge is oriented as shown in Figure 1 Properly inserting a chart cartridge below Insert the cartridge gently but firmly into position with one straight smooth motion If you only partially insert the cartridge stop then m...

Page 20: ... expose the cartridge to any environ mental damage please use caution when changing the cartridge Be careful when inserting the cartridge into the 958 see description and illus tration at right When you re not using the cartridge store it in a clean dry place away from heat humidity and dust Improper handling and stor age of the cartridge may dam age the Northstar 958 Such damage is not covered un...

Page 21: ...ottom of the screen Each additional press of the MORE INFO key shows the following information your vessel s present Speed Over Ground SOG Course Over Ground COG and heading your vessel s distance DIST and bearing BRG to the cur rent waypoint if any your vessel s position in lat lon or TDs if enabled the depth water temperature and Speed Through Water STW as measured by the echo sounder To display...

Page 22: ...datum for details see Appendix C Geodetic Datums starting on page 197 For details about determining and displaying your position see Determining Your Position starting on page 59 Using demo mode You can use demo mode to simulate a stationary position or simulate going to a cursor location on the CHART screen To access demo mode on the CHART screen press the CHART SETUP key then press the DEMO CONT...

Page 23: ...e cursor to the desired position then press the DEMO COG SOG key To set your vessel s speed use the KEYPAD to enter the desired speed then press the ENTER key to start going to the demo cursor location To go back to the CHART screen but stay in demo mode press the RETURN key twice The word DEMO always appears on the CHART screen when you re in demo mode To exit demo mode on the DEMO CHART screen p...

Page 24: ... at a time right on the chart This way of navigating provides the most flexibility in deciding where you want to travel Simply move the cursor wherever you want press a key and you re navigating 1 Press the CHART function key to display the CHART screen 2 Move the cursor to the desired chart location by pressing the CURSOR PAD in the lower right corner of the 958 3 Press the GO TO CURSOR menu key ...

Page 25: ...e 17 The 958 displays a track line to the new waypoint named QUIK and guides you directly to this point That s all you have to do to use the 958 in its simplest form To learn more about navigating to waypoints see Navigating to waypoints starting on page 110 ...

Page 26: ...Page 18 958 Operator s Manual Rev A Chapter 1 Getting Started ...

Page 27: ... the controls 20 Introducing the display screen 21 Introducing radar 25 Introducing the echo sounder 25 Introducing alarms TideTrack and video 25 Maintaining the 958 26 Interfacing the 958 28 This chapter introduces you to the 958 s features functions and display modes ...

Page 28: ...d can only learn more about how to use the 958 more efficiently The 958 always asks you to verify what you re doing when changing or deleting information You ll be asked to confirm your action before anything happens that may affect the 958 s operation You can always cancel a function at the last second For details about each of these controls see Using the Controls starting on page 29 Figure 2 95...

Page 29: ...avigating through a channel around an island or in open water always in full view of what s around you at all times Occasionally you may see an hourglass symbol briefly displayed on the screen while the 958 is changing or redrawing the chart Split screen overlay feature If your 958 is equipped with radar and or echo sounder you can split the screen to show the chart radar and sounder together in v...

Page 30: ...of the display screen let you perform the following functions restart the desired track line to run directly from your position to the waypoint zeroing the cross track error display change the options available for the CHART screen display additional position information in the INFO BAR at the bottom of the screen go to a waypoint nav aid or unmarked point you select on the CHART screen by pressin...

Page 31: ... icon on the bottom right side of the screen Alarm messages contain information you may want to read as soon as possible To see the alarm condition on the ALARMS screen press the STAR function key twice if the echo sounder is enabled Messages you haven t seen already display the word NEW in the upper right corner To turn off the flashing icon and remove the message press the CLEAR ALARM menu key I...

Page 32: ...ears when the 958 needs a response from you You must respond to any question window by pressing the ENTER key to answer yes or the CLEAR key to answer no Most of the other keys including the function keys as well as the video image display are temporarily inactive while the 958 displays a question window ...

Page 33: ...l part number GMRadarIM Introducing the echo sounder If your 958 is equipped with Northstar s optional sounder pressing the STAR key will display the full ECHO SOUNDER screen You can also display the ECHO SOUNDER screen in various combinations with other screens For information about viewing the sounder in combination with other screens see Splitting the screen starting on page 46 For information ...

Page 34: ...verlay an image from a connected video source onto most of the 958 s display screens You can also easily adjust the size position and transparency of the image that is how much of the underlying screen you can see through the video image For details see Using the video display option starting on page 160 Maintaining the 958 Basic maintenance To help retain the 958 s best possible performance North...

Page 35: ...ct the characteristics of the screen and cause your fingerprints to appear as bright reflections These will disappear however when you clean the screen as described above Protecting the 958 Excessive heat can cause short and long term damage to the 958 Although the 958 can recover from short term effects long term damage may be permanent When the 958 is out in the hot sun but isn t being used alwa...

Page 36: ...958 can be connected to a wide variety of compatible marine devices including the Northstar 490 that adds complete fishfinding capability to the 958 This type of connection should be done by a qualified marine electronics technician For details contact your local authorized Northstar dealer ...

Page 37: ...the five function keys 30 Using the CURSOR PAD 32 Using the SAVE key 33 Using the MOB key 33 Using the alphanumeric KEYPAD 34 Using the menu keys 35 Using the BRIGHTNESS key 36 Using the IN and OUT keys 36 This chapter explains how to use all of the various controls to operate the 958 ...

Page 38: ... any time on any screen to display the information you need CHART function key The CHART key displays your position on the CHART screen shows lat lon graphically or on the GPS POSITION screen shows lat lon numerically Both screens also display COG and SOG You can display position as any of the following as GPS WAAS or DGPS lat lon coordinates as lat lon from an external loran receiver if connected...

Page 39: ...e VIDEO SETUP screen where you enable the video image and adjust its size and placement on the dis play screen display graphical TideTrack information at over 3 000 NOAA tide stations display the time day and date and the time of today s sunrise and sunset display screens that lets you set up the 958 according to your specific needs For details about alarms TideTrack and video see Alarms TideTrack...

Page 40: ...lly press the CURSOR PAD between any two of its arrows Pressing the CURSOR PAD while displaying text screens will move the flashing cursor to the data you want to either display or change For example when you re entering such data as the name of a waypoint or its coordinates press the CURSOR PAD down to move the cursor down to a particular area of data then press the CURSOR PAD right to move the c...

Page 41: ...ns the 958 will start to overwrite the existing numbered waypoints as soon as the 958 reaches the maximum number of saved waypoints you ve set For details about using the MAX SAVED WAYPT function in the DISPLAY OPTIONS menu see Choosing the number of saved waypoints starting on page 166 Using the MOB key To enter Man Overboard mode MOB press the MOB key to display the MAN OVERBOARD info window The...

Page 42: ...as waypoint coordinates you can use the KEYPAD to enter one digit 0 through 9 with each keypress The flashing cursor moves automatically to the next digit position For entries such as latitude and longitude where you must enter digits into specific character positions the cursor starts on the left side of the data area and you enter characters left to right into their correct positions For other n...

Page 43: ... a character first find the key containing the character and press that key one to four times to display the desired character To move the cursor to the next character position press the CURSOR PAD right Using the CLEAR and ENTER keys The KEYPAD has CLEAR and ENTER keys for erasing or entering data that s already been typed The CLEAR key removes any data you ve already typed resetting the field to...

Page 44: ...double arrow to adjust the screen s brightness Using the IN and OUT keys On the CHART and the 3D STEER screens and on the radar each press of the IN key zooms in to double the scale and each press of the OUT key zooms out to halve the scale On other screens you can also use the IN key and OUT keys to adjust the transparency of the video image if already displayed Pressing IN lets you see more of t...

Page 45: ... on the chart screen 42 Comparing vessel and browse modes 44 Splitting the screen 46 Controlling the screen 48 Rotating the chart 49 Setting up the chart screen 53 Using distance and bearing mode 57 This chapter explains the electronic chart the different chart modes vessel and browse the various chart symbols and their meanings and how to set up the chart display ...

Page 46: ...art boundary lines The 958 displays the boundary line of each chart on the CHART screen To turn this feature off press the CHART SETUP key on the CHART screen then press the CHART DETAIL key and turn off the CHART EDGES option Chart details If you move from a highly detailed chart to a less detailed one you may see a sudden change in the detail shown on the screen just as if you had changed from o...

Page 47: ...d red channel markers as green and red circles respectively Approach buoys are shown as circles with black on the upper half and white on the lower half Sound buoys featuring an audible signal such as a bell gong or whistle are identified by a description in the INFO BAR such as BELL WHIS GONG or HORN Some nav aids have no chart symbol and are shown on the CHART screen as text only When you move t...

Page 48: ...Page 40 958 Operator s Manual Rev A Chapter 4 Using the Chart Screen Landmarks There are other objects shown on the CHART screen that aren t classified as nav aids including various onshore landmarks ...

Page 49: ...OUT key approximately halves or doubles the chart scale respectively At the highest detail for a particular chart you can use the 958 as a precision plotter When you zoom in past that level the center of the chart is magnified to fill the screen and all text and symbols are doubled in size Zooming in still further causes the 958 to remove all chart detail from the screen for safety reasons leaving...

Page 50: ...e at the time However if the radar overlay doesn t appear on the chart you can scale the chart and radar separately Controlling the cursor on the chart screen Pressing the CURSOR PAD displays the cursor symbol on the CHART screen Further pressing of the CURSOR PAD will move the cursor across the screen If you have trouble finding the cursor in a busy part of the CHART screen just look at the sides...

Page 51: ...t or nav aid this menu key would be GO TO WAYPT or GO TO NAV AID respectively You can use the cursor for the following functions select a nav aid or waypoint to show its name lat lon and distance and bearing navigate to it add it to a route designate a point on the chart to show its lat lon navigate to it add it to a route store as a waypoint select a leg of a route to follow or edit view a new ar...

Page 52: ...f the CHART screen returning the 958 to vessel mode Vessel mode Vessel mode is indicated by the word VESSEL in the upper right corner of the screen In this mode you can perform the following functions see your vessel s present position in relation to your intended course line and any nearby waypoints nav aids land masses etc split the screen SPLIT key to display the chart simultaneously with radar...

Page 53: ...display position details at the bottom of the screen MORE INFO key Browse mode Browse mode is indicated by the word BROWSE in the upper right corner of the screen In this mode you can perform the following functions view any area on the chart by moving the cursor there CURSOR PAD quickly determine distance and bearing to other points on the CHART screen CURSOR PAD split the screen SPLIT key to dis...

Page 54: ...the CHART screen GO TO CURSOR key Splitting the screen If you have radar and or the echo sounder installed and operational you ll see the SPLIT key when you view the CHART screen otherwise you ll see a VIDEO key The following discussion assumes that the SPLIT key is available You can split the screen in the following ways Overlay video View the chart alone View the chart and sounder together View ...

Page 55: ... 958 Operator s Manual Rev A Page 47 Figure 3 Examples of split screens To split the screen 1 Press the SPLIT key to view the SELECT A SPLIT SCREEN menu Video overlaying chart Chart and sounder Chart and radar Chart radar and sounder ...

Page 56: ...n starting on page 160 For details on the sounder see the Northstar 490 Operator s Manual part number GM490 For details on radar and the radar overlay see Understanding Radar Functions starting on page 125 Controlling the screen f you have radar installed and operational you ll see the CONTROL key when you view the CHART screen otherwise you won t see any key The following discussion assumes that ...

Page 57: ...e the angle of the charts that are displayed on the CHART screen As long as you re in vessel mode you can turn charts to any one of the following angles North up You ll see north pointing straight upwards the chart isn t turned Course up You ll see your vessel s current direction of travel whatever that direction is pointing straight upwards Course up represents your true COG as determined by the ...

Page 58: ...by leg basis so the chart turns accordingly whenever you start navigating on a new leg even if you haven t turned the vessel yet Exception If you select leg up when you aren t currently navigating the 958 automatically uses course up until you start navigating along another leg If you re viewing course up heading up or leg up the text from the Navionics cartridge is tilted to match the rotation an...

Page 59: ...et to north up Notice the direction of the north pointing arrow in the upper right corner Figure 2 Course up chart angle second leg going east Figure 2 shows the same chart but with the chart s viewing angle now set to course up and the vessel on a slightly different course than the second route leg Notice the new direction of the north pointing arrow Figure 3 Leg up chart angle third leg going so...

Page 60: ... course angle This feature lets you keep a steady viewing angle if you re browsing around on the chart Leg up If you re displaying charts as leg up and the 958 switches to a new leg you ll see the chart rotate to the direction of that new leg even in browse mode unless you re actively pressing the CURSOR PAD NOTE If you re displaying the charts as either leg up or course up you may see a black lin...

Page 61: ...the CHART screen turn the radar overlay on and off and adjust the 958 s track control If the CHART screen s in And the radar image is Overlaid on the chart Not overlaid Browse mode The chart can t rotate but if you change the CONTROL key to RADAR the chart s mode automatically switches to vessel see below The chart can t rotate but the radar can rotate so if you change the radar to leg up the char...

Page 62: ...tem then press the ON OFF menu key to turn the item on or off off is represented by two dashes Lat lon grid The ON setting shows lat lon lines on the CHART screen Turn lat lon lines off when these lines add clutter to your screen or when you don t need them Text info The ON setting shows the names of local cities towns harbors channels bodies of water etc Waypoint names The ON setting shows the na...

Page 63: ...tions see Changing the track control starting on page 56 Waypoints The ON setting shows your waypoints on the CHART screen and the OFF setting turns them off with the exception of waypoints on a route Nav aids The ON setting shows nav aids from the Navionics chart cartridge and the OFF setting hides the nav aids Land masses The ON setting shows the coloring of land masses to contrast between water...

Page 64: ...ine The more often you mark your track the faster you fill up the track memory The maximum track length depends on how often points are stored To display the TRACK CONTROL screen press the TRACK CONTROL menu key on the CHART SETUP STATUS screen You can choose among the following options for point storage and the corresponding track length every 1 second for 60 minutes total every 2 seconds for 120...

Page 65: ... ERASE TRACK menu key and the ENTER key Press the RETURN menu key twice to return to the CHART screen Using distance and bearing mode The 958 lets you quickly check the distance and bearing between any two points on the CHART screen You can also use this function to make new waypoints that you define by their distance and bearing from another point 1 Press the WAYPTS ROUTES key to display the WAY ...

Page 66: ... s Manual Rev A Chapter 4 Using the Chart Screen 4 To make a waypoint at the next cursor location press the ADD WAYPT menu key then enter its name symbol or description on the NEW WAYPOINT screen and press ENTER to save it ...

Page 67: ... Page 59 5Determining Your Position Displaying position COG and speed 60 Using GPS 60 Using DGPS 63 Using loran 66 Using Phantom Loran 68 This chapter explains the 958 s most basic navigational function determining your position ...

Page 68: ...rdinates from GPS satellites alone from GPS plus the radiobeacon differential system from GPS plus WAAS satellites NOTE The 958 can display position as Loran TDs if the 958 is connected to a loran receiver Also it can display Phantom Loran coordinates that is if you don t have a loran receiver but want to see your position as loran TDs the 958 will convert GPS coordinates into Loran coordinates Us...

Page 69: ... readings over a short period of time however by changing the GPS speed averaging value see Changing your receiver settings starting on page 172 The 958 displays the name of the datum currently in use in the center of the screen The datum describes the reference of the chart you re currently using Most new charts use the NAD83 or WGS84 datum which are nearly identical Make sure the datum that the ...

Page 70: ...tes are currently located in the sky Satellites are identified by their PRN number a two digit number assigned by the U S government GPS satellites are represented by circles WAAS satellites are represented by hexagons The center of the satellite map represents the center of the sky and the outer or last ring is the horizon The view is looking down from above with East to your right and West to yo...

Page 71: ... is turned on and before it s ready to navigate HDOP can range from an ideal value of slightly less than one up to poor values of 10 or more Any value less than two indicates excellent satellite configuration Using DGPS When using the 958 with optional radiobeacon DGPS you ll usually see position measurements accurate to about one to three meters speed measurements accurate to about 0 1 knot and C...

Page 72: ...ransmitter currently used The upper part of the screen shows the beacon s name frequency baud rate and the beacon s distance and bearing from your vessel The lower part of the DGPS STATUS screen shows three bar graphs SNR The Signal to Noise Ratio is a good measure of over all signal quality and should be as high as possible Val ues of 15 and higher are best anything below 10 could indicate poor r...

Page 73: ...tatus message is being received but no SC 104 DGPS corrections are present NOT INSTALLED No beacon receiver status message is being received nor has an external DGPS source been chosen SC 104 IN OK An external source has been chosen and the required data is being received SC 104 IN FAIL An external source has been chosen but the required data isn t being received RESULTS UNKNOWN The communication ...

Page 74: ...splay EXTERNAL LRN as the position source 4 Press the ENTER key then press the RETURN menu key 5 Press the CHART key to display the GPS POSITION screen 6 Press the CHECK LORAN key to display the LORAN POSI TION screen TOO FEW CORRECTIONS DGPS is off because not enough satellites with corrections are available POOR BCN DOP DGPS is off because the satellites with corrections have poor geometry DOP i...

Page 75: ...e loran Checking GPS status To display GPS coordinates and signal status press the CHECK GPS menu key The 958 continues to navigate using loran and will display loran data the next time you display the LORAN POSITION screen Viewing loran status To check the quality of signals being received by your loran press the LORAN INFO menu key from the LORAN POSITION screen The SNR for each loran transmitti...

Page 76: ...ude and longitude Returning to GPS navigation To return to using GPS signals for navigation repeat the steps shown for selecting loran in Selecting and displaying loran on page 66 but specify GPS instead of loran Using Phantom Loran If you have lists of fishing spots and other waypoints that you recorded as loran time differences TDs the 958 can automatically convert its GPS coordinates into TDs i...

Page 77: ...corded TDs obtained directly from actual loran signals In most areas TD errors shouldn t exceed one microsecond However larger errors are possible in areas with poor configuration or for which the 958 doesn t have accurate factory programmed ASF correction points Selecting and displaying Phantom Loran To display position coordinates as Phantom Loran TDs 1 Press the STAR key to display the OPTIONS ...

Page 78: ...antom Loran GRI Press the SET GRI menu key to change the GRI to be used in calculating the displayed TDs Press the CURSOR PAD to display the available GRIs one at a time When the GRI is correct press the ENTER key Checking GPS status Press the SAT INFO menu key to display the status of the GPS receiver Checking DGPS status Press the DGPS INFO menu key to display the current status of the different...

Page 79: ...ypoint coordinates 74 Creating new waypoints 75 Creating avoidance area waypoints 80 Editing waypoints 83 Updating waypoint coordinates 84 Moving waypoints routes between units 85 Transferring waypoints to and from a PC 91 This chapter explains all of the functions associated with creating displaying editing and managing your waypoints ...

Page 80: ...ther to form routes follow these routes edit or erase waypoints or routes plot waypoints or routes transfer all waypoints and routes between any two 958 s transfer waypoints and routes from the 958 to a PC and back again Displaying waypoints You can display waypoints in any of four ways A graphic chart view of waypoints A list of up to 30 local waypoints sorted by nearest first A list of all waypo...

Page 81: ...t If your 958 is new these lists will be empty WAYPOINTS CHART screen Waypoints are displayed on the chart WAYPOINTS LOCAL screen Up to 30 way points within 100 nm nearest one first ROCKS PILING WRECK AVOID1 WAYPOINTS AVOIDANCE screen Up to 30 avoidance waypoints within 100 nm nearest one first WAYPOINTS ALPHA screen All waypoints in alphabetical order ...

Page 82: ...hundreds of stored waypoints often the local waypoints are the only ones you may be interested in at the moment On the alpha screen The WAYPOINTS ALPHA screen displays all stored waypoints in alphabetical order Waypoints with a digit as the first character appear near the beginning of the list Those starting with a dash or parenthesis are at the end On the avoidance screen The WAYPOINTS AVOIDANCE ...

Page 83: ...es as lat lon loran TDs or distance and bearing on the NEW WAYPOINT screen Assigning a name and description To permanently store a waypoint you must give it a name The name can be from one to six characters long and must be different from all the other waypoint names stored in the 958 You can also enter a description of up to 16 characters on the line below the name Assigning a symbol You can give...

Page 84: ...creen 1 Press the WAYPTS ROUTES key 2 Press the WAYPOINTS menu key You may have to press the NEXT VIEW menu key to display the graphical WAYPOINTS screen 3 Press the CURSOR PAD to move the cursor where you want to add the new waypoint You can zoom in or out as necessary to precisely place your waypoint 4 Press the ADD WAYPT menu key to display the NEW WAYPOINT screen ...

Page 85: ...o ensure it s correct For distance and bearing from your present position leave the FROM point set to HERE and enter the bearing and the distance to the desired waypoint For distance and bearing from any other stored waypoint press the FROM menu key to display a list of waypoints Press the CURSOR PAD to select the desired waypoint and press the ENTER key Enter the bearing and the distance from the...

Page 86: ...1 Press the WAYPTS ROUTES key 2 Press the WAYPOINTS menu key The 958 displays a waypoint list if you had displayed a list during a previous viewing however if you had previously displayed a graphical screen you must press the NEXT VIEW menu key to display the list views These list views comprise waypoints listed numerically in order of distance WAYPOINTS LOCAL list as shown below alphabetically WA...

Page 87: ...the pair After entering the GRI check the name of the GRI that s automatically displayed to ensure it s correct For distance and bearing from your present position leave the FROM point set to HERE and enter the bearing and the distance to the desired waypoint For distance and bearing from any other stored waypoint press the FROM menu key to display a list of waypoints Press the CURSOR PAD to selec...

Page 88: ...ea waypoints You can make avoidance areas from new or existing waypoints If you travel into an avoidance area the 958 will sound a beeping alarm and flash the star symbol on the screen The 958 displays an avoidance area on the CHART screen as a waypoint surrounded by a circle The circle is the avoidance area s warning radius which you set when you create or edit the waypoint The 958 gives you the ...

Page 89: ...US box at the bottom of the screen The warning radius can be as large as 4 9 nautical miles Be sure to allow a little extra distance around the hazard area so you ll have time to respond by turning or stopping after you hear the alarm and to allow for the typical accuracy of the navigation source in use To make an existing waypoint into an avoidance area 1 Press the WAYPTS ROUTES key then press th...

Page 90: ... set the audible avoidance area alarm 1 Press the STAR key to display the ALARMS screen 2 Press the CURSOR PAD to select the ALARM AUDIO option 3 Press the EDIT ALARM menu key 4 Press the CURSOR PAD to change the setting to ON 5 Press the ENTER key to make your selection or CLEAR to leave it unchanged NOTE If you want to set the 958 s alarm to sound only when you enter an avoid ance area turn off ...

Page 91: ...e WAYPTS ROUTES key then the WAYPOINTS menu key The 958 displays waypoints in whatever format you last used WAYPOINTS CHART screen WAYPOINTS LOCAL screen WAYPOINTS ALPHA screen or WAYPOINTS AVOIDANCE screen If necessary press the NEXT VIEW menu key to display the format you want 2 To select a waypoint on the list screens press the CURSOR PAD To select a waypoint on the WAYPOINTS CHART screen move ...

Page 92: ...ng waypoints To permanently erase the waypoint press the ERASE menu key on the EDIT WAYPT screen then press the ENTER key NOTE You can t erase a waypoint if it s used in a route you must first remove it from the route For details about editing routes see Editing a route start ing on page 100 Updating waypoint coordinates Before electronic chart navigators a waypoint s position was usually taken fr...

Page 93: ... the INFO BAR 2 Press the WAYPTS ROUTES key then WAYPOINTS menu key If necessary press the NEXT VIEW key to display the WAYPOINTS CHART screen then press the EDIT WAYPT menu key 3 When ready press the UPDATE COORD menu key 4 Press the ENTER key or press CLEAR to cancel Updating from a list screen 1 Press the WAYPTS ROUTES key then the WAYPOINTS menu key 2 If necessary press the NEXT VIEW menu key ...

Page 94: ...ng the two units The two units must be properly connected with the correct cabling interface ports and port setting For interfacing infor mation contact your authorized Northstar dealer Moving waypoints and routes into a unit When you move waypoints and routes into unit 1 the designated master from unit 2 the entire contents of unit 2 are imported into unit 1 Also if any exact waypoint or route na...

Page 95: ...ns that all waypoints and routes not just the ones already in the receiving unit and the ones left to be transferred are re transferred 1 Choose the unit you d like to use as the master Remember You can use either of the two units because both units are capable of importing or exporting waypoints and routes Make sure the second unit is on 2 At the master unit press the WAYPTS ROUTES key to display...

Page 96: ...o this master unit from the other unit press the START key The status bar displays the message TRANSFERRING and updates every second with the number of waypoints and routes already received against the total quantity to be received The progress bar located below the status bar graphically displays the percentage completed If there s a problem with the transfer process the following messages may ap...

Page 97: ...ER ABORTED BY KEY HIT will be displayed the process will be aborted and the master unit will display the particular screen accessed by that function keypress You can press any key on the other unit without interrupting the transfer process To purposely stop the transfer at any time press the STOP key If you press the STOP key the master unit displays the dialog box message TRANSFER ABORTED BY KEY ...

Page 98: ...PORT menu key to display the EXPORT DATA screen The status bar in the center of the screen displays the message READY TO TRANSFER to show that the transfer is ready to start 5 Before transferring check the communication link between the two units by pressing the TEST COMM key If the status bar now displays the message REMOTE LINK OK you may begin to transfer waypoints ...

Page 99: ...R ROUTES TO TRANSFER and the status bar message NO TRANSFER DONE If the other unit is completely full of waypoints and routes no more room available the master unit displays the dialog box message REMOTE UNIT STATUS ERROR 002 DATABASE FULL and the status bar message TRANSFER ERROR 7 If the transfer is successful the status bar displays the message TRANSFER COMPLETE You can now press any key to res...

Page 100: ...Page 92 958 Operator s Manual Rev A Chapter 6 Understanding the Waypoints Function transfer software and instructions and cable ordering information contact your authorized Northstar dealer ...

Page 101: ...eating routes from a waypoints list 97 Saving a route as you travel 97 Editing a route 100 This chapter explains how to create a route from existing waypoints or new waypoints and how to create a route by saving it as you travel You ll also learn how to change the route by inserting removing or changing the order of its waypoints ...

Page 102: ... forward or backward direction You can start following a route in either of two ways go directly to any waypoint in the route cross track dis tance starts at zero because you re on the course line from your present position to the waypoint along any leg of the route cross track distance starts at your distance from the leg Route and waypoint capacity A route can have up to 35 waypoints Each route ...

Page 103: ...5 Creating routes from the chart To create a route graphically from the CHART screen 1 Press the WAYPTS ROUTES key and then press the ROUTES menu key The names of any previously stored routes are shown on the ROUTES screen 2 Press the NEW menu key to display the NEW ROUTE screen ...

Page 104: ...menu key will read ADD WAYPT if the cursor is on anything else the menu key will read ADD NEW WP Press the particular key to add a new waypoint Waypoints that are newly created as you travel are named 0001 0002 etc as you enter them The parentheses indicate that the waypoint is part of a saved route and the four digit number uniquely identifies each waypoint Each new waypoint is automatically give...

Page 105: ...menu key The SELECT WAYPT screen appears which lists all of your stored waypoints If you want to switch between the LOCAL and ALPHA lists press the NEXT VIEW key 7 Move the cursor to select the desired waypoint then press the ENTER key to place the waypoint in your route 8 Repeat Steps 6 and 7 until your new route is complete To see the route on the CHART screen at any time press the CHART menu ke...

Page 106: ...TES screen 2 Press the SAVE menu key to begin saving a route auto matically The SAVE ROUTE screen is displayed asking you to enter the name of the new route to be saved 3 Enter the name of the new route to be saved using the KEYPAD and CURSOR PAD then press the ENTER key The 958 displays the message SAVING TO ROUTE NAME at the bottom of the ROUTES screen confirming that your route is now being sav...

Page 107: ...ically given a description with the time and date you stored the waypoint Note While you re automatically saving a route you can access all of the 958 s navigation functions except you can t edit the route you re presently saving If at any time you re not sure if you re still saving a route press the WAYPTS ROUTES key then the ROUTES menu key to display the ROUTES screen If you re still saving a r...

Page 108: ...the following functions change the route name add new or existing waypoints to the beginning middle or end of the route remove waypoints from the route On a routes list you can perform all the functions above plus you can erase the entire route Editing a route on the chart screen To edit a existing route on the CHART screen 1 Press the WAYPTS ROUTES key then press the ROUTES menu key to display th...

Page 109: ... s name do so now If the message at the bottom of the screen says PRESS ENTER TO CONTINUE USING LIST press the USE CHART menu key to edit using the chart 4 Press the ENTER key to display the EDIT ROUTE chart screen showing the route you selected The direction of the route is indicated by a series of small arrows in each leg and the cursor is in the middle of the screen From here you can add waypoi...

Page 110: ...t first waypoint to the cursor position 3 If you ve selected an existing waypoint press the ADD WAYPT menu key If you ve selected only a cursor posi tion press the ADD NEW WP menu key in this case this waypoint is stored with a name similar to 0001 with the parentheses indicating the waypoint is part of a saved route and the four digit number uniquely identifying each waypoint 4 Repeat these steps...

Page 111: ...e SPLIT LEG key then move the cursor to the existing waypoint or other location that you want to add to the middle of the route As you move the cursor the 958 displays the new connecting route legs as dotted lines to and from the new waypoint 3 If you ve selected an existing waypoint press the INSERT WAYPT menu key If you ve selected only a cursor posi tion press the INSERT NEW WP menu key in this...

Page 112: ...een press the CHART key Adding waypoints to the end of a route To add waypoints to the end of a route 1 Move the CURSOR PAD to select the last waypoint in the route 2 Press ADD TO END menu key then move the cursor to the existing waypoint or other location that you want to add to the end of the route As you move the cursor the 958 displays the new route leg as a dotted line from that last waypoint...

Page 113: ... the CHART screen press the CHART key Removing waypoints from a route To remove waypoints from the route the waypoint is not removed from the 958 1 Move the cursor to the waypoint you want to remove then press the REMOVE WAYPT menu key 2 You can remove more waypoints by selecting them with the cursor and pressing the REMOVE WAYPT menu key Even if you remove all the waypoints from a route the 958 s...

Page 114: ... the ROUTES menu key to display the ROUTES screen 2 Press the CURSOR PAD to select the route you want to change then press the EDIT menu key The name of the route is displayed on the EDIT ROUTE screen 3 If you want to change the route s name do so now If the message at the bottom of the screen says PRESS ENTER TO CONTINUE USING CHARTS press the USE LIST menu key to switch to list based editing ...

Page 115: ...t to insert another waypoint in between two existing waypoints To add a waypoint to the beginning of the route be sure to position the pointer above the first waypoint not right onto it 2 Press the INSERT menu key to display the SELECT WAYPT screen that lists all your stored waypoints To switch between the LOCAL and ALPHA lists press the NEXT VIEW key Note you can t add an avoidance point into a r...

Page 116: ...asing an entire route To erase a route 1 On the ROUTES screen press the CURSOR PAD to select the route you want to erase 2 Press the ERASE menu key 3 Press the ENTER key or the CLEAR key to cancel the action Editing a route you re navigating along If you change a route you re navigating along the 958 stores the changes but they won t appear in the copy of the route you re navigating along To enabl...

Page 117: ...ating to waypoints 110 Steering to a waypoint 112 Navigating along routes 116 Restarting the course line 118 This chapter explains the different ways you can navigate to waypoints and along routes and describes how to get back on course or follow a new course line to your destination ...

Page 118: ...sor location press the GO TO CURSOR menu key If you selected a waypoint press the GO TO WAYPT menu key 3 Press the ENTER key If you selected an existing waypoint the 958 begins guid ing you directly to it If you chose a new cursor location the 958 stores the location as a new waypoint with the name QUIK and begins guiding you directly to it Repeating this same pro cedure will create a new QUIK way...

Page 119: ...ion or from any waypoint stored in the 958 loran TDs make sure the GRI displayed is correct and change it if necessary 3 Use the KEYPAD to enter the waypoint s coordinates If you like you can now give the QUIK waypoint a unique name after you ve entered its coordinates since the next QUIK waypoint you make will overwrite this one Just move the cursor to the NAME field and change the name from QUIK...

Page 120: ... key to display the most convenient list often the LOCAL list since the waypoints you navigate to are usu ally nearby 2 Press the CURSOR PAD to select the waypoint you want to navigate to 3 Press the GO TO menu key then press the ENTER key The 958 begins guiding you directly to the waypoint Steering to a waypoint To display information that helps guide you directly to your destination waypoint pre...

Page 121: ...to steer by when you want to get to a waypoint and don t need to stay precisely on the designated course line Displaying distance and bearing Both screens show your distance and bearing to the waypoint and your Speed Over Ground SOG and Course Over Ground COG Your 958 may show an arrow between the SOG and COG displays pointing upwards when the trend of your speed is increasing and down when it s d...

Page 122: ...w the limits of your cross track distance This same distance is also displayed in numbers near these vertical lines If you go over this cross track distance limit the 958 issues an alarm and your vessel symbol will flash To display this alarm message press the STAR key To clear the alarm press the CLEAR ALARM menu key To adjust the cross track limit see Choosing the cross track scale starting on p...

Page 123: ...is an information box where you can display the following information Estimated Time Enroute ETE to the waypoint and Esti mated Time and Date of Arrival ETA Speed of Advance SOA and graphical heading correction Waypoint name description and position coordinates Press the MORE INFO key to cycle through the three choices 1 2 3 ...

Page 124: ...provides a comprehensive view of your progress towards your destination waypoint graphically showing your position in relation to the course line and nearby waypoints so that you can steer with the utmost precision Navigating along routes To follow a previously stored route press the WAYPTS ROUTES key then press the ROUTES menu key to display the ROUTES screen Press the CURSOR PAD to select the ro...

Page 125: ...ively If you decide not to follow this route press the RETURN menu key to go back to the ROUTES screen Reversing the route To follow the route in the opposite way of the route s small directional arrows press the REVERSE menu key The direction of the route and the arrows will change from end to end Starting the route To go directly to any selected waypoint in the route the nearest one is the defau...

Page 126: ...se line When travelling from one waypoint to another you may find you ve gone off your planned course line Maybe you avoided an obstacle or drifted slightly off course Whenever you re off course you can get back by one of two methods after passing the obstacle you can steer your vessel back to the original course line by using the cross track error display and just continue to the waypoint Course ...

Page 127: ...creen by pressing the NAV LOG key or the CHART screen s vessel mode by pressing the CHART key then the VESSEL key then press the RESTART menu key and the ENTER key If you re on the chart screen you must first press the vessel key The 958 recalculates the course line to go from your present position directly to the next waypoint and resets your cross track error to zero ...

Page 128: ...Page 120 958 Operator s Manual Rev A Chapter 8 Understanding Waypoint Route Navigation ...

Page 129: ... Introducing the nav log 122 Changing your trip 123 Stopping and restarting navigation 124 This chapter explains the 958 s nav log function which gives you a quick and easy way to check your progress during your trip and make changes to it while you travel ...

Page 130: ...in sequential order When you navigate to these waypoints or along an already stored route the series of waypoints is copied into the nav log which acts as a kind of scratch pad to monitor your progress You can change the nav log s route in any way you want without affecting the original route which remains safely stored in the 958 To see the waypoints you re currently navigating along press the NA...

Page 131: ...screen press the APPEND WAYPT menu key to display a chart view of the trip waypoints on the APPEND WAYPT screen 2 Press the CURSOR PAD to select the desired waypoint 3 Press the SELECT WAYPT menu key then press the ENTER key to add the waypoint to the nav log Note Any waypoints added in this manner aren t permanently added to the original route stored in the 958 To perma nently change a route you ...

Page 132: ... won t display distance and bearing to waypoints or ETA or ETE Restarting navigation You can restart navigation along any leg or to any waypoint of the trip On the NAV LOG screen move the cursor arrow to highlight the waypoint or leg When you select a waypoint a triangle points to the waypoint When you select a leg an arrow points from the first waypoint to the second Press the RESTART menu key ...

Page 133: ...ontrolling radar 126 Turning radar on and off 128 Overlaying radar on the chart 128 Changing scale and rotation 130 Using the main radar keys 132 Using the adjust radar keys 134 Using the radar markers keys 137 This chapter first describes radar briefly and then explains how to display control and adjust the 958 s radar ...

Page 134: ...raphically displayed on a screen for you to see The target might be other boats or ships navigational markers flocks of birds land masses or some other object By knowing how long it takes for a signal to return the distance to a target can be determined As the radar antenna scans through a 360 degree rotation it shows where the target is relative to your position By repeated scans of a target such...

Page 135: ...iew the radar NOTE If you haven t turned the radar transmitter on you ll see a blank screen or a residual echo To turn on the radar transmitter see Turning radar on and off starting on page 128 Among other items of information the radar image includes A north indicator to show the direction of True or Magnetic North see Choosing magnetic variation starting on page 169 ...

Page 136: ...ing scale and rotation starting on page 130 Turning radar on and off When you power up the Northstar 958 radar is off This is a safety feature To turn radar on you must turn on the radar transmitter 1 Press the SPLIT key to show radar 2 If needed press the CONTROL key until it indicates RADAR 3 Press the ADJUST RADAR key 4 Press the NEXT key until you see page 2 with the RADAR TX key 5 Press the R...

Page 137: ...Chapter 10 Understanding Radar Functions 958 Operator s Manual Rev A Page 129 2 Press the CHART SETUP key to display the CHART SETUP screen 3 Press the RADAR OVERLAY ON key to overlay radar on the chart ...

Page 138: ...ough faintly Press the ADJUST RADAR key then access page 2 by pressing the NEXT key if needed Press the FADE key to select off no transparency 1 or 2 maximum transparency If you power off the 958 when you turn it on again the chart still has a radar overlay To remove the radar overlay press the CHART SETUP key then press RADAR OVERLAY OFF Changing scale and rotation Changing the scale To change th...

Page 139: ...the chart starting on page 49 The rotation of the chart and the rotation of the radar interact under certain circumstances as described in the table below Assume that the chart and radar are both north up at the start If the CONTROL key indicates RADAR you re rotating the radar if it indicates CHART you re rotating the chart If the CHART screen s in And the radar image is Overlaid on the chart Not...

Page 140: ...us of the function such as COURSE UP To change the status 1 Press the key to select the function a small arrow appears next to the function 2 Press the key again to select the status a small arrow appears next to the status 3 Press the key repeatedly until you access the status you want Choosing the split Press the SPLIT key to view the SELECT A SPLIT SCREEN menu Then choose the split you prefer f...

Page 141: ...ing the radar image Press the ROTATE key repeatedly to set the screen rotation You can choose North up course up heading up or leg up Adjusting the radar Press the ADJUST RADAR key to display the first of three pages of radar adjustments For more information about using these keys see see Using the adjust radar keys starting on page 134 Using the radar markers Press the RADAR MARKERS key to displa...

Page 142: ...sing the keys The keys on each page have two or more parts the upper part shows the function such as RAIN CLUTTER and the lower part shows the status such as MANUAL Some keys also have a middle part that shows a numerical value such as 30 To use a key 1 Press the key once to select the function a small arrow appears next to the function 2 Press the key a second time to select the status a small ar...

Page 143: ...et adjustment for each range When you first use the radar you may need to make many manual adjustments until the 958 learns the optimum settings for each range However once the 958 learns the settings the Range Rider setting may be preferable to either manual or automatic settings Adjust radar page 1 Press the keys to adjust the rain clutter sea clutter gain and electrical interference The RAIN CL...

Page 144: ...s mitter on or off the radar transmitter is automatically turned off every time you shut down the 958 therefore you must turn the RADAR TX key to ON every time you power up the 958 Turning the transmitter off when it is not in use can save electrical power and allows you to work safely in the vicinity of the rotating antenna When you overlay a radar image on a chart you can choose whether the rada...

Page 145: ...and other factors The heading calibration matches the displayed radar heading with the actual heading of the vessel Using the radar markers keys Press the RADAR MARKERS key to display the first of three pages of controls for the 958 s range rings bearings electronic bearing lines EBLs variable range markers VRMs and guard zones Press the NEXT key to display the next page of adjustments Press the D...

Page 146: ... called VRM A The VRM at Point B is called VRM B You can change the size of each VRM to use it for measuring distances from Point A or Point B to any point of interest on the screen The floating EBL is a pink line between any Point A and any Point B It s similar to the fixed EBL except that Point A can also be moved to allow measuring distances between any two points on the screen Again there s a ...

Page 147: ... show or hide the EBL When an EBL is hidden it is turned off furthermore you can t use the EDIT key for that EBL You select the visibility of each EBL separately Press the EDIT repeatedly to select what part of the EBL is controlled by the cursor pad Point A floating EBL only the position of one end of the EBL Point B the position of the other end of the EBL VRM A the size of the VRM circle at poi...

Page 148: ... red lines Radar echoes within a guard zone are displayed in red Press the following keys to adjust each guard zone Press the GUARD ZONE key repeatedly to select zone 1 2 or 3 You can adjust only one zone at a time Press the VISIBILITY key repeatedly to show or hide the zone When a zone is hidden it doesn t display and doesn t alarm furthermore you can t use the EDIT or TRIGGER LEVEL keys for that...

Page 149: ...inute passes with no further adjustments When you press DONE the alarm is enabled Radar markers page 3 Range rings are concentric circles around your vessel that appear on the screen at fixed intervals These rings are controlled by the radar and represent distance You should be careful to note the spacing of the range rings An object three rings away would be 1 5 nm miles from your vessel if range...

Page 150: ...Page 142 958 Operator s Manual Rev A Chapter 10 Understanding Radar Functions ...

Page 151: ...l Rev A Page 143 11Alarms TideTrack and Video Display Understanding alarms 144 Understanding TideTrack 158 Using the video display option 160 This chapter describes the 958 s alarms TideTrack and the optional video display ...

Page 152: ...ll sound if you ve turned on the alarm audio Each alarm has a distinctive beep that s based on Morse code If you re choosing whether to keep the alarm audio on or off remember that the audio beep may be a necessity when you re unable to look at the display screen Understanding alarm icons There are 18 possible alarm icons depending on the particular alarm condition For a detailed explanation of th...

Page 153: ...Recent alarm messages The 958 keeps a record of the one most recent alarm from each main category anchor avoidance communications cross track and waypoints This lets you browse through the older alarm messages Each successive press of the CLEAR ALARM menu key will show you the most recent alarm message from each category Clearing alarms Clearing an alarm means removing the flashing alarm icon as w...

Page 154: ...learing These will stay onscreen until you clear them on the ALARMS screen All of the 958 s alarms are described in Table 6 below NOTE The following abbreviations are used in Table 6 For alarm message NAME name of waypoint For must be cleared N no Y yes Table 6 958 alarms ALARM ICON MESSAGE ACTIVATED WHEN ICON TIMES OUT ON SCREEN MUST BE CLEARED MANUALLY YOUR ANCHOR MAY BE DRAGGING Vessel has move...

Page 155: ... you re navigating to a single waypoint Within 10 seconds N YOU VE ENTERED AVOID ZONE Vessel has entered the warning radius of an avoidance waypoint This alarm is shown only if you ve turned it on at the ALARMS screen Does not time out Y NOW NAVIGATING TO WAYPT NAME Vessel has switched to the next leg of the route Within 10 seconds N Table 6 958 alarms continued ALARM ICON MESSAGE ACTIVATED WHEN I...

Page 156: ... seconds N CROSS TRACK LIMITS EXCEEDED Vessel has exceeded the off course limit set in the CROSS TRACK alarm This alarm is shown only if you ve turned it on at the ALARMS screen Does not time out N DEMO MODE IS ON You ve powered up the 958 while already in demo mode Does not time out N Table 6 958 alarms continued ALARM ICON MESSAGE ACTIVATED WHEN ICON TIMES OUT ON SCREEN MUST BE CLEARED MANUALLY ...

Page 157: ... fixes are being used Does not time out N BIG JUMP IN GPS POSITION Your displayed GPS position suddenly jumps an unreasonable amount based on the vessel s speed Does not time out Y NO GPS POSITION FIX GPS position fix is unavailable and GPS or Phantom loran is the chosen position source This alarm is delayed for three minutes at power up Does not time out N Table 6 958 alarms continued ALARM ICON ...

Page 158: ...X Position fix from an external loran receiver is unavailable and external loran is the chosen position source This alarm is delayed for three minutes at power up Does not time out N LORAN COMMUNICATION FAILURE The 958 hasn t received any messages from the external loran receiver for over 30 seconds Does not time out Y Table 6 958 alarms continued ALARM ICON MESSAGE ACTIVATED WHEN ICON TIMES OUT O...

Page 159: ...ORAN SIGNALS BLINK CYCLE or LOW SNR detected in the external loran used as the position source Does not time out N Sounder alarms only shown on the 958 if sounder is enabled BOTTOM COLLISION Echo sounder detects that the seabed is higher than the specific limit you ve set Within 20 seconds after the seabed becomes lower than the limit set N Radar alarms only shown on the 958 if radar is enabled Ta...

Page 160: ... alarms anchor alarm cross track arrive radius DGPS alarm RADAR GUARD VIO LATION An object enters the guard zone Does not time out Y RADAR DATA NOT AVAILABLE The 958 hasn t received radar data for several seconds When new data comes in N Table 6 958 alarms continued ALARM ICON MESSAGE ACTIVATED WHEN ICON TIMES OUT ON SCREEN MUST BE CLEARED MANUALLY ...

Page 161: ...e position where you pressed the DROP ANCHOR key You can turn the anchor alarm on or off and set the anchor drag distance The default setting is 0 20 nautical miles about 1200 feet You can set the anchor alarm to as little as 01 nm Note Turn off the anchor alarm before you intentionally move away from the anchor drop point To set the anchor alarm 1 Press the DROP ANCHOR menu key where you ve dropp...

Page 162: ...RSOR PAD to turn the alarm to ON 3 To set the cross track distance limit press the CURSOR PAD right and use the KEYPAD to enter the distance then press the ENTER key Arrive radius The arrive radius is a circle around your current active waypoint The default setting for the radius is 0 20 nautical miles or about 1200 feet You can set the radius to as little as 0 01 nm There are two alarms triggered...

Page 163: ...oosing a DGPS corrections time out starting on page 176 To turn on the DGPS alarm press the CURSOR PAD to highlight DGPS ALARM then press the EDIT ALARM menu key Press the CURSOR PAD to turn the alarm to ON then press the ENTER key Setting alarms to honk You can set the 958 to honk in addition to the beep if a honker has been connected to pin 14 on the interface connector Once you set the anchor a...

Page 164: ...econd of silence This 3 5 minute honk cycle repeats forever until you manually clear the anchor alarm This honk does not automatically clear under any conditions To clear the alarm press the STAR key to display the ALARMS screen then press the CLEAR ALARM key You may also want to set the anchor alarm back to the OFF setting Honking for all alarms Instead of setting all alarms to only beep you can ...

Page 165: ... alarm beep Beep Anchor alarm Set ALARM AUDIO to ON Set ANCHOR ALARM to ON The 958 s standard alarm beep Honk All alarms Set ALARM AUDIO to ON Set HONK OUTPUT to ALL ALARMS Alarm icons flash the 958 simulta neously emits an output sound for half a second followed by silence for half a second until the alarm is manually cleared Honk Anchor alarm Set ANCHOR ALARM to ON Set HONK OUTPUT to ANCHOR ALM ...

Page 166: ...es see Tide Tables published by the NOS NOAA Rockville Maryland 20852 The water height for any 24 hour period is displayed for the selected NOAA tide station The name of the selected tide station and the selected day are shown at the top of the screen The center of the screen shows a graphic representation of the tide height for the entire day Maximum and minimum heights are shown as dashed horizo...

Page 167: ... TRACK screen press the CONFIGURE menu key 2 Press the CHOOSE CLOSEST TIDE STATION menu key The 958 searches for the nine stations closest to your present position and displays this list with the closest sta tion at the top 3 Press the CURSOR PAD to select the desired station then press the ENTER key twice to display the tides for that station on the TIDE TRACK screen Choosing a tide station from ...

Page 168: ...of the current date flashes 2 Press the CURSOR PAD to move to the month or digit you want to change To change a digit press that key on the KEYPAD To change the month press the CURSOR PAD up and down 3 When the date is correct press ENTER twice to display the tides for the new date Using the video display option If the 958 is connected to a video camera or other video source you can display the im...

Page 169: ...ly color bars will be shown instead of a video image Adjusting the video s transparency To adjust the video s transparency press the IN and OUT keys Pressing OUT lets you see through more of the video to the screen underneath pressing IN will make the video more opaque If you re displaying the CHART screen or 3D STEER screen or radar the IN and OUT keys are reserved for zooming You must display a ...

Page 170: ...s TideTrack and Video Display Changing the video s size and location Press the STAR key to display the VIDEO SETUP screen To change the size of the image press a number from 1 to 9 on the KEYPAD To move the image around on the screen press the CURSOR PAD ...

Page 171: ...Changing your port settings 177 Setting up the sounder 177 Setting up radar 177 Displaying manufacturer s information 178 Changing the time zone 182 This chapter explains the various options for changing how the 958 displays information computes navigation data and communicates with other devices You can change each option at any time according to your specific needs ...

Page 172: ...y to access the DISPLAY OPTIONS screen Changing the settings To change any of the options explained in detail on the following pages select the option by pressing the CURSOR PAD to move the arrow at the left of the screen then press the EDIT menu key The selected option flashes waiting for you to change it using the CURSOR PAD or the KEYPAD Once you ve made the change press the ENTER key or press ...

Page 173: ...thod of calculating distance and bearing to waypoints Great circle and rhumb line are virtually the same if the start and end points are closer than 100 nm You can approximate a great circle using a series of shorter rhumb lines Choosing distance and speed units You can set the 958 s display of distances and speeds to any of the following units of measurement nautical miles and knots nm knots kilo...

Page 174: ...waypoint previously designated number 1 For many applications you may want to set this maximum number to a small value such as five or ten as long as you promptly rename any saved waypoints you want to save permanently before they re overwritten by the 958 To change this option press the EDIT menu key Using the KEYPAD enter the value you want up to a maximum of 199 and press the ENTER key For one ...

Page 175: ...u power up the 958 then press the ENTER key Your message can be changed only by entering your access code number and repeating the above procedure The 958 gives you three attempts at entering the correct access code after that all operations freeze requiring you to turn power off then turn it back on again to resume functioning Changing your navigation settings To access the 958 s navigation optio...

Page 176: ...D or the KEYPAD Choosing a navigation source The 958 s position displays and waypoint navigation are based on position information that it obtains from any one of the following navigation sources GPS choose this for GPS and WAAS Phantom Loran choose this if you want to see your posi tion displayed as loran TD s the 958 calculates Phantom Loran coordinates from the GPS coordinates external loran ch...

Page 177: ...tic variation for each area Under most conditions you ll want the 958 to calculate the variation automatically for your position since the automatically calculated variation usually is entirely adequate The manual setting 1º to 180º is available when the display must match an older or less accurate chart or in remote areas such as above 70º north latitude where the 958 s variation calculations can...

Page 178: ...Defense Mapping Agency publications You should always be sure that the datum the 958 uses matches your Nav Chart cartridge All Navionics charts for the last few years use WGS84 which is the 958 s default A few old charts from areas such as South America have other datums Contact Navionics for more information If you choose a datum other than WGS84 an offset will be applied but only to the GPS lat ...

Page 179: ...n page 164 To change the cross track full scale setting on the NAVIGATION OPTIONS screen choose the CROSS TRACK FULL SCALE option and press the EDIT menu key Press the CURSOR PAD to see the choices then press the ENTER key to make your selection Changing the steering precision The STEER DIST PRECISION option adds precision to the distance to waypoint and cross track error displays on the STEERING ...

Page 180: ...Chapter 12 Setting Up Your 958 Changing your receiver settings To access the 958 s receiver options press the STAR key until you see the OPTIONS SERVICE INFO screen Press the RECEIVER OPTIONS menu key to access the RECEIVER OPTIONS screen ...

Page 181: ...tes are slightly erratic varying by up to several knots The 958 s GPS speed averaging function can help steady these readings This function lets you select the time over which your speed is averaged with choices between two and ten seconds Averaging can also be turned off for the quickest possible reaction time You can change the speed averaging value at any time without affecting other navigation...

Page 182: ...ng only the best station As you travel the receiver will switch to another frequency automatically as conditions require Automatic mode Automatic mode can usually be used for all applications The 958 enters automatic differential mode as soon as it receives corrections and requires no further supervision of differential operation It maintains automatic operation by using two independent receiver c...

Page 183: ...ency any value between 283 5kHz and 325kHz and press the ENTER key NOTE You can also manually set the baud rate the transmitter s data transmission speed for the selected differential frequency However Northstar strongly recommends leaving the BEACON BAUD RATE setting at AUTO NOTE The 958 can manually control a non Northstar external differential receiver as long as the receiver supports the MX50R...

Page 184: ... minor loss of accuracy you can increase the value up to a maximum of four minutes which lets the 958 ignore the occasional outage of differential reception Regardless of the setting if the time out period ends without any new corrections the 958 goes back to standard GPS navigation displays the OLD CORRECTIONS status message on the DGPS STATUS screen and displays the DGPS LOST alarm DGPS will aut...

Page 185: ...y the OPTIONS SERVICE INFO screen then the PORT SETUP OPTIONS key then the WIRING INFO key For details about interfacing the 958 contact your local authorized Northstar dealer Setting up the sounder For the sounder to work with the 958 you must set up the 958 s AUX port for fishfinding 1 Press the STAR key to display the OPTIONS SERVICE INFO screen 2 Press the PORT SETUP OPTIONS key 3 Set the AUX ...

Page 186: ...s style software update cartridge from Northstar or your local authorized Northstar dealer 1 Press the STAR key to display the OPTIONS SERVICE INFO screen 2 Press the MORE key 3 On the MORE OPTIONS SERVICE INFO screen press the SOFTWARE UPDATE key 4 On the SOFTWARE UPDATE screen to install the update follow the instructions on your screen Displaying manufacturer s information To see your 958 s ser...

Page 187: ... version will be displayed in this field Beacon receiver self test If your 958 is connected to an optional Northstar radiobeacon receiver the receiver is automatically tested each time the 958 powers up If all test parameters are met the message PASSED is displayed in the BEACON RCVR SELF TEST field If the differential receiver fails any of the test criteria the 958 displays the message FAILED In ...

Page 188: ...ce Testing the 958 s keypad A built in keypad test lets you check the integrity of the 958 s keys This function works for all keys except PWR BRIGHTNESS SAVE and MOB key pressing SAVE or MOB during the keypad test saves a waypoint instead of testing the keys On the OPTIONS SERVICE INFO screen press the MORE key to display the MORE OPTIONS SERVICE INFO screen Press the DIAGNOSTICS menu key then the...

Page 189: ...key on the OPTIONS SERVICE INFO screen then the IGNORE DOOR key on the MORE OPTIONS SERVICE INFO screen then the ENTER key The 958 will then let you use the cartridge as if the door was functioning properly The bypass stays in effect until you disable it or shut the 958 off The next time you turn the 958 on the IGNORE DOOR command won t be in effect you must re invoke it by re pressing the IGNORE ...

Page 190: ... the screen the current time expressed as GMT Greenwich Mean Time is displayed Note that the day of the week in Greenwich England may be different from the day in your local time zone right screen above To change the time zone used for the time display for both this and other time displays press the TIME ZONE menu key and use the CURSOR PAD to select the desired zone and standard or daylight time ...

Page 191: ... 30 meters better than 100 feet 95 percent of the time according to the U S government This means that you can expect to be within 100 feet of your intended position 95 percent of the time and beyond that area approximately five percent of the time When they developed GPS the Department of Defense included a system of built in errors called Selective Availability SA which they introduced as a nati...

Page 192: ...the rocks if it s 30 meters out of place Although this magnitude of error won t always be the case prudent navigators should always choose the maximum margin of safety Furthermore the precise location of bottom features for fishing and diving is significantly degraded without some kind of DGPS and therefore would usually be of little use unless there s better than the 100 feet of accuracy 30 meter...

Page 193: ...ing uncorrected GPS The integrity monitor tells the DGPS receiver to switch automatically to other available satellites What is Loran Although susceptible to weather and limited to coastal use loran is a dependable system familiar to thousands of mariners Since the 1970 s loran users have relied on its ability to repeatedly return them to a previously saved location with extreme accuracy Fishermen...

Page 194: ...e two areas GPS consistently excels when it comes to absolute accuracy GPS provides an absolute accuracy better than 100 feet nearly everywhere in the world under virtually any conditions This far surpasses the 600 foot absolute accuracy that s achievable from a good loran receiver under ideal conditions If you re used to your Northstar loran s repeatable accuracy always returning you to within a ...

Page 195: ...avigation features of the 958 including the worldwide absolute accuracy of GPS Introducing radar The name RADAR is derived from the phrase Radio detection and ranging How does radar work Radar is easy to understand if you take this example Suppose you shout towards a cliff and in a few seconds you hear the echo Knowing the speed of sound is constant approximately 1 100 feet per second you can ther...

Page 196: ...e display It points towards the bow of the boat Range rings are concentric rings that represent distance from your vessel They are changed any time the radar range is adjusted therefore the operator must be careful to note what range the display is on An object three rings away on a 0 5 nm per range ring is 1 5 nm from the boat However on a 5 nm per range ring the object is 15 nm from the boat Det...

Page 197: ... strength of the reflected wave This strength will vary depending on the type of material size shape and height of the target Among the strong reflectors are bluffs facing the ship buildings breakwaters rock walls and mountains Some of the weaker targets are wooden boats sandy beaches and rubber lifeboats ...

Page 198: ...Page 190 958 Operator s Manual Rev A ...

Page 199: ...M depending on antenna range accuracy better than 8 m or 0 9 percent of maxi mum range of scale in use bearing accuracy better than 1 degree power requirements 10 1 to 40 1VDC connects directly to Northstar 958 with a choice of antennas General Course up leg up heading up and north up chart view ing angles Video in VGA out Fully functional remote control optional Split screen sounder chart using o...

Page 200: ... longitude 158 datums from GPS with one sec ond updates Phantom Loran C TDs calculated from GPS Real time GPS DGPS status screens Loran C TDs from an external source two second update rate Steer screens Large graphical presentation Cross track error traditional and three dimensional Waypoint name position Bearing and distance to waypoint Speed Course Over Ground SOG and COG Estimated Time of Arriv...

Page 201: ...sition Update waypoint coordinates to vessel s position Edit erase waypoints or routes directly on the CHART screen or on list screens Plan route function Plot any route with automatic chart scale selection Plot the position of land masses nav aids landmarks nearby waypoints routes avoidance areas Waypoint navigation Point and shoot navigation on the CHART screen Navigate to coordinates waypoints ...

Page 202: ...adian NOAA tide station for today or any other date up to the year 2010 Interfacing Two bi directional NMEA I O ports 1 auxiliary port Two bi directional RS 232 ports Waypoint upload download capability NMEA output sentences APB BOD BWC GGA GLC GLL GSA GSV LCD HSC MSS RNN RMA RMB VTG WCV XTE ZDA ZTG Conforms to NMEA v 2 0 and later Supports 1 5 GLL and BWC One VGA out port connects to Northstar 12...

Page 203: ...unlight viewability 640 x 480 pixel high temperature backlit transmissive color LCD Flush mount standard High contrast anti reflective screen Waterproof chart cartridge door Large easy to use backlit controls Easy interfacing I O connectors 10 36 volts DC power 0 degrees Celsius 55 degrees Celsius max 95 percent rel ative humidity non condensing ...

Page 204: ...Page 196 958 Operator s Manual Rev A ...

Page 205: ...s Islands AUSTR 491 22 435 ARC50_MN ARC 1950 mean value CL1880 143 90 294 ARC50_B ARC 1950 Botswana CL1880 138 105 289 ARC50_L ARC 1950 Lesotho CL1880 125 108 295 ARC50_M ARC 1950 Malawi CL1880 161 73 317 ARC50_S ARC 1950 Swaziland CL1880 134 105 295 ARC50_ZR ARC 1950 Zaire CL1880 169 19 278 ARC50_ZM ARC 1950 Zambia CL1880 147 74 283 ARC50_ZB ARC 1950 Zimbabwe CL1880 142 96 293 ARC60_MN ARC 1960 m...

Page 206: ...66 2 150 181 CARTH Carthage CL1880 263 6 431 CHAT Chatham 1971 S W Pac Isl INTL 175 38 113 CHUA Chua Astro INTL 134 229 29 CORR Corrego Allegre INTL 206 172 6 DJAK Djakarta Batavia B1841 377 681 50 DOS68 DOS 1968 S W Pac Isl INTL 230 199 752 EI67 Easter Island 1967 INTL 211 147 111 EUR50_MN European 1950 mean value INTL 87 98 121 EUR50_WE European 1950 Western Europe INTL 87 96 120 EUR50_CY Europe...

Page 207: ...156 271 189 IND_TV Indian Thailand Vietnam EVRST 214 836 303 IND_BIN Indian Bangladesh India Nepal EVRST 289 734 257 IRE65 Ireland 1965 AIRYM 506 122 611 ISTS ISTS 073 Astro 1969 INTL 208 435 229 JI61 Johnston Island 1961 INTL 191 77 204 JAND Kandawala Sri Lanka EVRST 97 787 86 KERG Kerguelen Island Indian Ocean INTL 145 187 103 KERT Kertau 1948 Malaysia EVRSTM 11 851 5 KKJ KKJ Finnish FINN 78 231...

Page 208: ... North American 1927 Alaska CL1866 5 135 172 NAD27_BH North American 1927 Bahamas CL1866 4 154 178 NAD27_SS North American 1927 San Salvador Island CL1866 1 140 165 NAD27_CN North American 1927 Canada CL1866 10 158 187 NAD27_AB North American 1927 Alberta and B C CL1866 7 162 188 NAD27_EC North American 1927 East Canada CL1866 22 160 190 NAD27_MO North American 1927 Manitoba and Ontario CL1866 9 1...

Page 209: ... AIRY 371 112 434 OSGB_IM Ordin Survey of G B 1936 Isle of Man Wales AIRY 371 111 434 OSGB_SSI Ord Surv of G B 1936 Scot Shetlnd Islands AIRY 384 111 425 OSGB_WL Ordinance Survey of Great Britain 1936 Wales AIRY 370 108 434 PDLN Pico De Las Nieves Canary Islands INTL 307 92 127 PA67 Pitcairn Astrological 1967 INTL 185 165 42 PSC63 Provisional S Chilean 1963 INTL 16 196 93 PSA56_MN Provisional S Am...

Page 210: ... 616 97 251 SA69_MN South American 1969 mean value SA1969 57 1 41 SA69_AG South American 1969 Argentina SA1969 62 1 37 SA69_BO South American 1969 Bolivia SA1969 61 2 48 SA69_BR South American 1969 Brazil SA1969 60 2 41 SA69_CH South American 1969 Chile SA1969 75 1 44 SA69_CO South American 1969 Colombia SA1969 44 6 36 SA69_EC South American 1969 Ecuador SA1969 48 3 44 SA69_GY South American 1969 ...

Page 211: ...B1841 123 483 662 TOK_KR Tokyo Korea B1841 128 481 665 TOK_OK Tokyo Okinawa B1841 135 478 661 TA68 Tristan Astrological 1968 S Atl INTL 632 438 609 VL16 Viti Levu 1916 S W Pac Isl CL1880 51 391 36 WE60 Wake Eniwetok 1960 HOUGH 101 52 39 WGS72 WGS 1972 WGS 72 0 0 4 5 WGS84 WGS 1984 WGS 0 0 0 ZAND Zanderij S America INTL 265 120 358 Table 9 Available 958 datums continued ID Datum name ELLIPSOID delt...

Page 212: ...Page 204 958 Operator s Manual Rev A ...

Page 213: ...ously collected Avoidance point A waypoint that you enter into the database and define by its radius and either its lat lon or loran TDs or distance and bearing It indicates an area into which you specifically want to avoid navigating beacon A radio transmitter operated by the U S Coast Guard which supplies differential corrections to GPS receivers bearing The magnetic course from your present pos...

Page 214: ...lly activate and position DGPS Differential Global Positioning System A technique developed by the U S Coast Guard for correcting basic GPS position to increase its accuracy from 20 30 meters 65 100 feet to 1 3 meters 3 9 feet ephemeris Data used to calculate exact satellite positions continually updated and derived from information relayed to the 958 in each satellite s data stream EBL Electronic...

Page 215: ...ypoints in a route leg up An orientation of the CHART screen in which the viewing angle matches your desired track when navigating on a leg by leg basis longitude Imaginary lines on the Earth s surface running North South and expressed in degrees 0 180 east or west of the Prime Meridian a line running from the North to South Pole passing through Greenwich England Loran C LOng RAnge Navigation A sy...

Page 216: ...onics Association The industry group that establishes the standards for exchanging data between electronic navigation equipment The standard that s currently in wide use is NMEA 0183 which specifies the format for sentences containing specific types of data Phantom Loran Northstar s exclusive loran simulation feature that mathematically converts GPS lat lon coordinates to loran TDs in real time as...

Page 217: ... between loran signals received from the master and the secondary stations target Boats or ships navigational markers land masses or any other object detected by radar track A desired line of travel or path already travelled VRM Variable Range Marker A circle on the radar surrounding one of the end points of the electronic bearing line used to measure distances from that end point to any other poi...

Page 218: ...Page 210 958 Operator s Manual Rev A ...

Page 219: ...nition of 183 205 with DGPS 187 with GPS 186 with loran 185 187 with Phantom Loran 69 Aids to navigation See Navigation Alarms anchor 153 arrive radius 154 audible 82 155 157 avoidance area 82 cautions 81 clearing 9 23 145 cross track 154 DGPS 155 honk See Alarms audible icons 23 144 146 152 messages 145 setting 152 understanding 31 144 157 Arrive radius See Alarms Avoidance area creating on the c...

Page 220: ...of 205 Chart cartridge access door bypassing safety features 181 cautions 181 inserting properly 10 maintenance 26 obtaining 10 CHART function key 30 Chart screen changing chart display details 54 55 chart scale 41 choosing tide stations from 158 controlling 48 49 133 creating routes on 95 creating waypoints on 74 displaying with Navionics Nav Chart cartridges 7 displaying your present position on...

Page 221: ... ground displaying on chart screen 13 134 displaying on radar 134 displaying on steering screens 113 Cross track alarm 154 displaying 114 116 error zeroing out 118 Cursor definition of 206 finding on the chart screen 32 symbol on chart screen 42 using on the chart screen 42 43 Cursor pad pressing to control cursor 32 42 using the 32 D Database sharing waypoints routes See importing and exporting w...

Page 222: ... from 63 65 manual control of choosing 175 self test results 179 status of 64 70 understanding differential 184 Differential GPS See DGPS Display screen adjusting the brightness 22 36 dimming auto 22 splitting 46 48 Distance and bearing calculating 165 displaying 39 64 74 113 134 entering on quick waypoint screen 111 understanding 57 58 E Echo sounder See Sounder Electronic bearing lines EBL 137 1...

Page 223: ...ion keys using 30 35 G Global Positioning System See GPS GPS absolute accuracy 183 accuracy 63 174 checking status 62 67 70 choosing as navigation source 168 comparing to loran 186 converting coordinates to Loran TDs 68 to Phantom Loran 168 definition of 183 206 receiver collecting almanac data 205 displaying information from 60 63 software version 180 satellite accuracy of readings from improving...

Page 224: ...larm See Alarms Identification numbers 958 serial number 178 owner s ID message 166 Import export between two 958 s 85 Importing all waypoints and routes to a unit 85 IN key 36 Info bar 85 102 displaying on chart screen 13 displaying on radar screen 133 Interfacing your 958 to a personal computer 91 to other compatible devices 177 K Keypad testing 180 using the 34 35 L Lat lon See Latitude Longitu...

Page 225: ... updating coordinates on 85 Long Range Navigation System See Loran Longitude definition of 207 displaying 67 70 166 entering 111 Loran choosing as navigation source 168 definition of 207 displaying position as 66 entering TDs on chart screen 77 79 on quick waypoint screen 111 receiver displaying data from 66 68 M Magnetic variation changing 169 definition of 169 207 Maintaining the 958 cleaning 27...

Page 226: ...oing to a waypoint on the steering screens 112 116 options 167 172 restarting 124 reversing your trip 123 stopping 124 NMEA 0183 177 187 Noise levels atmospheric 65 Northstar contacting 3 O OUT key 36 Overlay See Radar and Video display image P Personal computer interfacing to 72 Phantom Loran 168 definition of 69 displaying 168 Position converting coordinates 85 converting coordinates from GPS to...

Page 227: ...25 main keys 132 134 overlaying on chart 128 131 radar markers keys 133 137 141 range rings 141 rotating 53 131 133 tuning 137 turning on off 128 variable range marker VRM 138 139 Range rings 141 Returning the 958 for service 4 Rhumb line definition of 165 RMA number See Service Rotating chart radar 49 52 131 Routes adding waypoints to beginning of routes 102 to end of routes 104 to middle of rout...

Page 228: ...ng 99 S Satellite changing elevation setting 176 effect of DPGS on 185 GPS system 60 62 183 185 205 status messages 62 status on first start up 9 SAVE key 33 97 180 Serial number required for repair 4 viewing your 958 s 179 Service obtaining technical support 3 returning the 958 for repair 4 5 RMA number 4 warranty statement 4 Setting up your 958 164 177 Sharing waypoints and routes See Import exp...

Page 229: ...g screens 113 Split choosing 46 48 132 introducing 21 STAR function key 23 31 Startup 5 7 STEER function key 30 Steering screens adding extra accuracy to 171 overview 31 units of measurement for 165 using the 112 116 Support See Service Symbols alarm 8 arrow for legs 124 arrow for tide level 158 arrow for waypoint pass status 123 arrows for routes 101 117 118 arrows for SOG and COG 113 buoys 39 cu...

Page 230: ...for today s date 160 displaying tide information 158 introducing 26 understanding 158 Time and date actual time of arrival 123 changing time zone 182 displaying 31 166 182 Estimated Time of Arrival 122 Time differences TDs converting 68 168 definition of 209 displaying 67 70 111 entering 77 79 Track clearing track history 57 definition of 209 definition of track line 55 displaying track history 56...

Page 231: ...urce 60 Warning radius 81 82 83 Warranty statement 3 4 Waypoints adding to routes and removing 100 108 trip 123 arrive radius 154 assigning symbols to 75 backing up 4 creating routes from 95 97 creating with SAVE key 33 definition of 72 209 designating as avoidance areas 80 82 displaying 55 193 displaying coordinates of 74 editing 83 84 importing and exporting between two 958 s 85 listing 72 makin...

Page 232: ...Rev A navigating to quick 16 navigating to stored 112 steering to 112 116 storing 75 transferring to a personal computer 91 warning radius for avoidance areas 81 83 WAYPTS ROUTES function key 31 Z Zooming chart screen 41 42 radar 131 ...

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